Net Ionic Equations and Reactions

The video tutorial explains how to write a balanced net ionic equation for the reaction between hydrobromic acid (HBr) and calcium hydroxide (Ca(OH)2). It begins by balancing the molecular equation, assigning states to each substance, and then splitting strong electrolytes into their ions to form the complete ionic equation. Spectator ions are identified and removed to derive the net ionic equation. Finally, the equation is simplified, ensuring charge and matter conservation.

What is the first step in writing a net ionic equation?

• Balance the molecular equation

• Write the states of substances

• Simplify the equation

• Identify spectator ions

Which of the following is a strong acid that dissociates completely in water?

• HF

• HBr

• H2SO4

• HCl

What state symbol is used for substances that dissociate completely in water?

• (l)

• (g)

• (s)

• (aq)

What is the charge of the calcium ion in the complete ionic equation?

• 2+

• 1+

• 1-

• 2-

Which ions are considered spectator ions in the reaction between HBr and Ca(OH)2?

• Hydrogen ions

• Calcium ions

• Hydroxide ions

• Bromide ions

What is the net ionic equation for the reaction between HBr and Ca(OH)2?

• 2H+ + 2OH- → 2H2O

• Ca2+ + 2Br- → CaBr2

• H+ + OH- → H2O

• HBr + Ca(OH)2 → CaBr2 + H2O

Why do we not split liquids into ions in net ionic equations?

• They are spectator ions

• They are not reactive

• They do not dissociate

• They are already balanced

What is the purpose of reducing coefficients in the net ionic equation?

• To change the reaction

• To balance the equation

• To simplify the equation

• To identify spectator ions

How is charge conservation demonstrated in the net ionic equation?

• By having equal numbers of atoms

• By having equal numbers of molecules

• By having equal numbers of ions

• By having equal positive and negative charges

What is conserved in a chemical reaction according to the net ionic equation?

• Temperature

• Volume

• Energy

• Mass and charge